Kind of a general question here but i just bought my 98 GTP a couple weeks ago, and it is bone stock.

-I would like to do some mods, but the car is my one and only daily driver so i dont want to compromise reliability.

-Im looking for opinions on some good mods that i could do to increase performance but not hurt the car, or kill gas mileage TO bad.

-include price, personal experience, performance gain, where to get, ETC ETC

i appreciate it very much, thank you